/*
 * Copyright (c) 2015 Spotify AB.
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package com.spotify.heroic.statistics.noop;

import com.spotify.heroic.statistics.ConsumerReporter;
import com.spotify.heroic.statistics.FutureReporter;
import com.spotify.heroic.statistics.HeroicTimer;

public class NoopConsumerReporter implements ConsumerReporter {
    private NoopConsumerReporter() {
    }

    @Override
    public void reportMessageSize(int size) {
    }

    @Override
    public void reportMetricsIn(int size) {
    }

    @Override
    public void reportMessageError() {
    }

    @Override
    public void reportMessageRetry() {
    }

    @Override
    public void reportConsumerSchemaError() {
    }

    @Override
    public void reportConsumerThreadsWanted(final long count) {
    }

    @Override
    public void reportConsumerThreadsIncrement() {
    }

    @Override
    public void reportConsumerThreadsDecrement() {
    }

    @Override
    public void reportMessageDrift(final long ms) {
    }

    @Override
    public FutureReporter.Context reportConsumption() {
        return NoopFutureReporterContext.get();
    }

    @Override
    public HeroicTimer.Context reportConsumerCommitOperation() {
        return new NoopTimerContext();
    }

    @Override
    public HeroicTimer.Context reportConsumerCommitPhase1() {
        return new NoopTimerContext();
    }

    @Override
    public HeroicTimer.Context reportConsumerCommitPhase2() {
        return new NoopTimerContext();
    }

    private static final NoopConsumerReporter instance = new NoopConsumerReporter();

    public static NoopConsumerReporter get() {
        return instance;
    }

    public class NoopTimerContext implements HeroicTimer.Context {

        @Override
        public long stop() {
            return 0;
        }

        @Override
        public void finished() throws Exception {
            stop();
        }
    }
}
